PHP Handleiding
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Hoofdstuk 12.
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The declare construct is used to is used to set execution directives for a block of code.
The syntax of declare is similiar to the syntax of other flow control constructs:
The statement part of the declare block will be executed - how it is executed and what side-effects occur during execution may depend on the directive set in the directive block.
The event( s) that occurs on each tick is specified using the register_tick_function().
Voorbeeld 12-1.
pre ?php / / A function that records the time when it is called function profile ($dump = FALSE) {static $profile; / / Return the times stored in profile, then erase it if ($dump) {$temp = $profile; unset ($profile); return ($temp);} $profile[] = microtime ();} / / Set up a tick handler register_tick_function("profile"); / / Initialize the function before the declare block profile (); / / Run a block of code, throw a tick every 2nd statement declare (ticks=2) {for ($x = 1; $x 50; ++$x) {echo similar_text (md5($x), md5($x*$x)), "br";}} / / Display the data stored in the profiler print_r (profile (TRUE));? / pre
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require()